Angle Review.

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Presentation transcript:

Angle Review

Angles with the same measure are congruent. If m1 = m2, then 1  2 Congruent “curtains”

Vertical Angles Vertical angles are two nonadjacent angles formed by two intersecting lines Vertical angles are ALWAYS congruent 4 3 1 2 Angles 1 and 3 are vertical; Angles 2 and 4 are vertical.

Complementary Angles Complementary angles are 2 angles whose measures have a sum of 90 degrees Complementary angles can be adjacent or nonadjacent 200 700

Supplementary Angles Supplementary angles are 2 angles whose measures have a sum of 180 degrees. Supplementary angles can be adjacent or nonadjacent. 520 1280

Angles One big and one small equal 180 “small” angles are equal “big” angles are equal One big and one small equal 180